My project is very fuzzy in htc vive?how can i get a clear seen?

this fuzzy show in vr confused me a long time ~
i use several method to solve this problem ,but failed.
1.i use commad r.ScreenPercentage 150, it works ,but make the project slow~ so ,not a good way
2.I try to change the rendering to forward shading, MSAA, it not work perfect
3.I set the r.SetRet 1920x1080f ,only make the windows bigger ,but not clearly
4.I try to change the package to shipping,it seems no result

the VR mode seems so fuzzy,but it is clear in pc mode, is there any ways to make the project clear in htc vive VR mode? i will be appreciate~

Is everything blurry or is it mostly textures?